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Doubt in getText() of ItemProviders [message #638379]

Thu, 11 November 2010 06:00

vaibhav

Messages: 22
Registered: September 2010

Junior Member

Hi,

This question is regarding the ItemProviders generated through EMF edit.How is the getText() method of an item provider is generated.How does EMF decide which attribute of the Model object to put in the getText() method.
For example In the given Library model for Library it is the name and for the book it is the title.
On what basis the attribute is selected ?

Best regards,
Vaibhav

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Re: Doubt in getText() of ItemProviders [message #638394 is a reply to message #638379]

Thu, 11 November 2010 07:46

Hallvard Traetteberg

Messages: 673
Registered: July 2009
Location: Trondheim, Norway

Senior Member

On 11.11.10 07.00, vaibhav wrote:
>
> This question is regarding the ItemProviders generated through EMF
> edit.How is the getText() method of an item provider is generated.How
> does EMF decide which attribute of the Model object to put in the
> getText() method.
> For example In the given Library model for Library it is the name and
> for the book it is the title.
> On what basis the attribute is selected ?

I believe it just selects the first attribute, and I don't think there
is a way of making it select a different one. You have to change the
code (and remember to set @generated NOT).

Hallvard

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Re: Doubt in getText() of ItemProviders [message #638459 is a reply to message #638394]

Thu, 11 November 2010 11:35

Nirmal Sasidharan

Messages: 120
Registered: July 2009
Location: Germany

Senior Member

If you modify the generated code, you could also reflectively look up the EStructuralFeatures and return a value dynamically. For example does the feature name contain "name" or "id" then return this.

Regards,
Nirmal

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Re: Doubt in getText() of ItemProviders [message #638470 is a reply to message #638459]

Thu, 11 November 2010 12:30

Ed Merks

Messages: 33141
Registered: July 2009

Senior Member

Guys,

It's determined by GenClass's Label Feature property, which defaults to
the first attribute or an attribute called "name" or "id" if it hasn't
been explicitly set in the properties view.

Nirmal Sasidharan wrote:
> If you modify the generated code, you could also reflectively look up
> the EStructuralFeatures and return a value dynamically. For example
> does the feature name contain "name" or "id" then return this.
>
> Regards,
> Nirmal

Ed Merks
Professional Support: https://www.macromodeling.com/

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